(ii) 2 m/s Explanation: As the car moves 2 m backward, the mirror also moves 2 m backward, so image comes 2 m forward. https://www.tiwariacademy.com/ncert-solutions/class-7/science/chapter-15/
(ii) 2 m/s
Explanation:
As the car moves 2 m backward, the mirror also moves 2 m backward, so image comes 2 m forward.
(iii) 6 m Explanation: As David moves 1 m towards the mirror, the image also moves 1 m towards the mirror. Now the distance between David and mirror is 3 m and the distance between mirror and image is 3 m. So, the total distance between David and his image will be 6 m. https://www.tiwariacademy.com/Read more
(iii) 6 m
Explanation:
As David moves 1 m towards the mirror, the image also moves 1 m towards the mirror. Now the distance between David and mirror is 3 m and the distance between mirror and image is 3 m. So, the total distance between David and his image will be 6 m.
The rear view mirror of a car is a plane mirror. A driver is reversing his car at a speed of 2 m/s. The driver sees in his rear view mirror the image of a truck parked behind his car. The speed at which the image of the truck appears to approach the driver will be
(ii) 2 m/s Explanation: As the car moves 2 m backward, the mirror also moves 2 m backward, so image comes 2 m forward. https://www.tiwariacademy.com/ncert-solutions/class-7/science/chapter-15/
(ii) 2 m/s
Explanation:
As the car moves 2 m backward, the mirror also moves 2 m backward, so image comes 2 m forward.
https://www.tiwariacademy.com/ncert-solutions/class-7/science/chapter-15/
See lessDavid is observing his image in a plane mirror. The distance between the mirror and his image is 4 m. If he moves 1 m towards the mirror, then the distance between David and his image will be
(iii) 6 m Explanation: As David moves 1 m towards the mirror, the image also moves 1 m towards the mirror. Now the distance between David and mirror is 3 m and the distance between mirror and image is 3 m. So, the total distance between David and his image will be 6 m. https://www.tiwariacademy.com/Read more
(iii) 6 m
Explanation:
As David moves 1 m towards the mirror, the image also moves 1 m towards the mirror. Now the distance between David and mirror is 3 m and the distance between mirror and image is 3 m. So, the total distance between David and his image will be 6 m.
https://www.tiwariacademy.com/ncert-solutions/class-7/science/chapter-15/
See lessA virtual image larger than the object can be produced by a
(ii) concave mirror https://www.tiwariacademy.com/ncert-solutions/class-7/science/chapter-15/
(ii) concave mirror
https://www.tiwariacademy.com/ncert-solutions/class-7/science/chapter-15/
See lessWhich type of lens forms always a virtual image?
Concave lens. https://www.tiwariacademy.com/ncert-solutions/class-7/science/chapter-15/
Concave lens.
https://www.tiwariacademy.com/ncert-solutions/class-7/science/chapter-15/
See lessWhich type of mirror can form a real image?
Concave mirror. https://www.tiwariacademy.com/ncert-solutions/class-7/science/chapter-15/
Concave mirror.
https://www.tiwariacademy.com/ncert-solutions/class-7/science/chapter-15/
See less